I'm seeing a problem upgrading our agents to IR3. The .MSI wants to Modify
or Remove, but not Upgrade. I seem to remember this happened before back in
the ZEN 6.5 days, and it ended up being a problem with some upgrade codes
(or something like that) missing in the .MSI.

The version I am testing upgrading from is, which is IR1.
Running Windows XPsp2.